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    <title>Document</title>
    <script>
        //等号符号是==   默认转换数据类型
        console.log(3 >= 5); //false
        console.log(2 <= 4); //true
        console.log(2 == 3); //false
        console.log(2 == '2'); //true
        //不等于!=
        console.log(2 != 2); //false
        //全等 ===
        console.log(18 === 18); //true
        console.log(18 === '18'); //false
    </script>
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